What was found
CAPTAIN REPORTED THAT DURING LANDING AUTO BRAKE DISARM LIGHT TURNED ON. MAINTENANCE PERSONNEL PERFORMED REVISION TO SYSTEM, DETECTING LEFT ANTI-SKID VALVE WITH FAILURE. THE S2 AND S3 SWITCH PACK M1766 AND M 1767 WERE CHECKED, IAW FIM 32-42 TASK 828 PROCEDURE AND ANTI-SKID AUTO BRAKE CONTROL UNIT WAS REPLACED IAW FIM 32-42 TASK 803. NO SHOWN FAILURE AND THE AACU WAS RETURNED TO POSITION ORIGINAL. LEFT ALT VALVE ASSY CONTROL WAS REPLACED IAW AMM 32-42-31-000-801AND 32-42-31-400-801. AUTO SPEED BRAKE MODULE WAS REPLACED IAW FIM 32-42 TASK 803 PROCEDURE AND AN OPERATIONAL TEST WAS PERFORMED IAW AMM 27-65-35. THE AACC OPERATIONAL TEST WAS PERFORMED IAW AMM 32-22-00, TESTED CORRECT.